refactor: properly extend the EventEmitter class

Author: darrachequesne

packages/engine.io/lib/server.ts

@@ -95,7 +95,11 @@ const ERROR_MESSAGES = new Map<ERROR_CODES, string>([
   [ERROR_CODES.UNSUPPORTED_PROTOCOL_VERSION, "Unsupported protocol version"],
 ]);
 
-export class Server extends EventEmitter<never, never, ServerReservedEvents> {
+export class Server extends EventEmitter<
+  Record<never, never>,
+  Record<never, never>,
+  ServerReservedEvents
+> {
   public readonly opts: ServerOptions;
 
   private clients: Map<string, Socket> = new Map();

packages/engine.io/lib/socket.ts

@@ -31,8 +31,8 @@ interface SocketEvents {
 const FAST_UPGRADE_INTERVAL_MS = 100;
 
 export class Socket extends EventEmitter<
-  never,
-  never,
+  Record<never, never>,
+  Record<never, never>,
   SocketEvents
 > {
   public readonly id: string;

packages/engine.io/lib/transport.ts

@@ -13,8 +13,8 @@ interface TransportEvents {
 type ReadyState = "open" | "closing" | "closed";
 
 export abstract class Transport extends EventEmitter<
-  never,
-  never,
+  Record<never, never>,
+  Record<never, never>,
   TransportEvents
 > {
   public writable = false;

packages/socket.io/lib/adapter.ts

@@ -31,7 +31,11 @@ interface AdapterEvents {
   "error": (err: Error) => void;
 }
 
-export class InMemoryAdapter extends EventEmitter<never, never, AdapterEvents> {
+export class InMemoryAdapter extends EventEmitter<
+  Record<never, never>,
+  Record<never, never>,
+  AdapterEvents
+> {
   protected readonly nsp: Namespace;
 
   protected rooms: Map<Room, Set<SocketId>> = new Map();